In recent weeks, members of the House and Senate and their staffers have held two classified hearings on the Sept. 11, 2012 terrorist attacks on the U.S. consulate in Benghazi, Libya; conducted more than 25 hours of formal, transcribed interviews with witnesses; and spoken informally with several dozen additional witnesses, including some who are being called "whistleblowers." Among those who have recently spoken to Congress is Marine Corps Col. George Bristol who was in the U.S. Africa Command (AFRICOM) chain of command on Sept. 11. Earlier this month, CBS News reported that the Pentagon declined Republican congressional requests to produce...